8312772138 has 64 divisors (see below), whose sum is σ = 18290880000. Its totient is φ = 2497728960.

The previous prime is 8312772089. The next prime is 8312772157.

8312772138 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8312772138.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5696853 + ... + 5698311.

It is an arithmetic number, because the mean of its divisors is an integer number (285795000).

Almost surely, 2^8312772138 is an apocalyptic number.

8312772138 is an abundant number, since it is smaller than the sum of its proper divisors (9978107862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8312772138 is a wasteful number, since it uses less digits than its factorization.

8312772138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147.

The product of its digits is 112896, while the sum is 42.

The square root of 8312772138 is about 91174.4050597535. The cubic root of 8312772138 is about 2025.7318606892.

The spelling of 8312772138 in words is "eight billion, three hundred twelve million, seven hundred seventy-two thousand, one hundred thirty-eight".